878590969 has 2 divisors, whose sum is σ = 878590970. Its totient is φ = 878590968.

The previous prime is 878590919. The next prime is 878590987. The reversal of 878590969 is 969095878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 825125625 + 53465344 = 28725^2 + 7312^2 .

It is a cyclic number.

It is not a de Polignac number, because 878590969 - 2¹³ = 878582777 is a prime.

It is a super-3 number, since 3×878590969³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (878590919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439295484 + 439295485.

It is an arithmetic number, because the mean of its divisors is an integer number (439295485).

Almost surely, 2^878590969 is an apocalyptic number.

It is an amenable number.

878590969 is a deficient number, since it is larger than the sum of its proper divisors (1).

878590969 is an equidigital number, since it uses as much as digits as its factorization.

878590969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 61.

The square root of 878590969 is about 29641.0352214628. The cubic root of 878590969 is about 957.7722391679.

The spelling of 878590969 in words is "eight hundred seventy-eight million, five hundred ninety thousand, nine hundred sixty-nine".